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(Nb Model.) 2 Sheets-Shee's I.

A. K. MINTON.. DUPLEX SAFETY ENVELOPE.

No. 424,123. Patented Mar. 25, 189.0.

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(No Model.) 2 Sheets-Sheet 2. A. K. MINTON. DUPLEX SAFETY ENVELOPE. No. 424,123. Patented Mar. 25, 1890.

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WITNESSES: v mvENTo Mia/" I BY .Z %ZA Z4, ATTORNEY NY PETER$ PhokrLithwlmpher, Wnhingiun. D-C- UNITED STATES PATENT OFFICE.

ALBERT K. MINTON, OF DENVER, COLORADO, ASSIGNOR OF TVVO-THIRDS TO D. -ALBERT ABRAMS AND WILLIAM E. GRAY, OF SAME PLACE.

DUPLEX SAFETY-ENVELOPE.

SPECIFICATION forming part of Letters Patent'No. 424,123, dated March 25, 1890.

' Application filed January 21, 1889. Serial No. 296.972- (No model.)

To all whom it may concern: as those used for corresponding parts in such Be it known that I, ALBERT K. MINTON, a blank. Each pocket has its own exterior citizen of the United States of America, rewall, 1 being that for 12 and 2 that for 13, and

siding at Denver, in the county of Arapahoe each wall has its own attached sealing-flap,

5 and State of Colorado, have invented certain the side 1 having the flap 3 and side 2 the new and useful Improvements in Duplex flap 4. In practice one of the pocketssay Safety-Envelopes, of which the following is a 12, for the purposes of illustration-is to be specification, reference being had therein to used for the reception of the contents to be the accompanying drawings. inclosed, and may be called the contents- [0 My invention relates to anew and improved pocket, While the other in this case then 13 form and construction of envelope; and its is merely to receive and guard the flap of such objects are to furnish an envelope which contents-pocket. This is illustrated in Fig. 5, while of simple construction shall have sealwherein the pocket 12 having received the ing-flaps so arranged that once sealed down contents-money or other inclosuresthe flap r 5 unauthorized tampering or openingv shall be 4 is turned down Within the pocket 13 and impossible without the leaving of indications sealed upon the interior thereof, the other showing that such tampering or opening has flap being then turned over and sealed in the taken place. ordinary way upon the exterior of the enve1- To this end my invention consists in a duope, one flap being used to seal its own pocket 20 plex envelope or one having two pockets or within the other pocket, while the other flap receptacles, each provided with its own sealseals both pockets and the first flap and the ing-flap, so that when either pocket" is used contents within the envelope. Supposing this for the reception of valuables or manuscript, outer flap to be opened, as in Fig. 2, it is evi- &c., its flap is sealed down within the second dent that the flap 3 cannot be got at and 25 pocket, wherein it cannot be reached for relifted unless the front or side 2 be at least opening without total or partial disruption of partially destroyed; hence there is perfect sesuch second pocket, whose flap is scaled down curity for the envelope and its contents upon the exterior of the duplex envelope in against anything short of absolute theft or the usual way. willful destruction of the entire thing.

30 In the drawings is illustrated an embodi- Such an envelope may be made in several ment of my invention, Figure 1 thereof being ways, and blanks therefore may be devised a top or birds-eye vieW of the envelope open. of warious shapes and either of one or more Fig. 2 is a transverse section on line 00 03, pieces. If two envelopes of ordinary con- Fig. 1; Fig. 3, a plan view of one style of struction and of the same or even different 3 5 blank suitable therefor; Fig. 4, a plan view of sizes be firmly secured together back to back,

such blank partially folded and secured. Fig. a duplex safety-envelope will be produced. 5 is a cross-section on the line 00 00, Fig. 1, For economy of labor and material, however, with the safety-flap 4 turned inwardinto sealin the production it is preferable that an ening position. velope be formed from a blank consisting of 0 Referring now to Figs. 1 and 2, the refera single piece of suitable fabric, properly ence-numerals 12 and 13 indicate the two shaped, creased, and gummed, and an illuso pockets or receptacles of the improved dutration of such a blank is given in Fig. 3, in plex safety-envelope. These pockets lie parwhich the lines of cutting are shown in full allel to each other, and preferably are similines, those of creasing by. regular broken 45 lar and of equal sizes, and are divided from lines, and the limits of the gummed spaces 11 each other by a central partition composed of byunequally-broken lines the numeral the parts 6 8 of the blank hereinafter de- 11 being in full lines where such gummed scribed. It may be noted that the referencespaces are on the side toward the eye and in numerals used in these figures are the same dotted lines when on the other side. This blank is composed of a central body portion divided by a crease or folding line into the parts 1 2 for forming the exterior faces of the envelope, the extensions for the sealingfiaps 3 4 being at opposite sides thereof. At the ends of part 1 are the flaps 5 '7, and at the ends of part2 the flaps 6 8, the lattcrhaving interior extensions 9 10, formed by cutting somewhat into the flaps 5 7, as shown. These extensions 9 10 are folded over upon the flaps 6 8, and thelatter folded over upon the part 2 and secured thereto and to each other by the gummed spaces 11, forming the pocket 13, which is then turned over upon the part 1.' The flaps 5 7 are then turned over upon the outer side of part 2 of pocket 13, and secured thereto, uniting all the parts together and forming the other pocket 12. It is evident that this method of folding the blank shown might be Varied and other sequences of folding and securing followed to accomplish the same object; but the blank and the mode of its folding are sufficient and typical for showing how the duplex safety-envelope may be formed.

Such envelopes may be of any desired shape square or oblong-and open at the side or the end and of any desired size.

Having thus described my invention, what I claim is- 1. A duplex safety-envelope having a contents-receiving pocket, a sealing and closing flap therefor, a second pocket for receiving and guarding such flap, and a flap for such second pocket for sealing over both pockets and such first flap, substantially as set forth.

2. A duplex safety-envelope having outer sides or faces 1 2, a central dividing wall or partition between such faces or sides, and flaps 3 4, substantially as set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERT K. MINTON.

W'itnesses:

Z. F. WILBER, D. ALBERT ABRAMS. 

